oral anatomy MCQs – Page 2

Practise focused oral anatomy questions with marked answers for exam preparation and subject revision.

oral anatomy Mcqs
21. The first evidence of calcification of primary anterior teeth begins approximately between ______________?
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A. 9 to 12 weeks in utero

B. 6- to 9 weeks in utero

C. 17 to 20 weeks in utero

D. 14 to 17 weeks in utero
22. Cervical bulge. True is____________?
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A. Enamel rods at cervical region directed occlusally

B. All of the above

C. Is characteristic of decidous teeth

D. Results in constriction at cervical region

23. Resorption of root of primary incisors starts at_____________?
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A. 8 yrs

B. 6 yrs

C. 4 yrs

D. 10 yrs

24. Retrusion of mandible is achieved by _______________?
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A. Temporalis

B. Masseter

C. None of the above

D. Lateral pterygoid

25. When a molar has no opposing tooth, it can become_______________?
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A. Protruded

B. Intruded

C. Retruded

D. Extruded
26. Which of these teeth are highly sturdy and usually the last ones to be lost ?
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A. Canines

B. Premolars

C. First molar

D. Central incisors

27. First evidence of initiation of primary dentition is usually around_____________?
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A. Birth

B. 4 months after birth

C. One year after birth

D. 4 months in utere
28. Number of teeth seen on X- ray at birth_______________?
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A. 22

B. 20

C. 30

D. 24
29. The highest ( longest ) and sharpest cusp on the decidous mandibular first molar is____________?
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A. Distolingual

B. Mesiobuccal

C. Distobuccal

D. Mesiolingual
30. Forward moment of mandible is done by_________?
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A. Medial pterygoid

B. Temporalis anterior fibers

C. Lateral pterygoid

D. Temporalis- posterior fibers

31. The direction of enamel rods in decidous teeth is_____________?
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A. Inclined in an apical direction in the cervical third of crown

B. Same as permanent teeth

C. Inclined in an occlusal direction in the cervical third of crown

D. None of the above

32. Generally in majority of children, the sequence of eruption of permanent teeth in mandible is____________?
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A. 6-1-2-4-5-3-7-8

B. 1-6-2-3-5-4-7-8

C. 6-1-2-4-3-5-7-8

D. 6-1-2-3-4-5-7-8
33. First permanent molars begin to calcify at ______________?
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A. About 1 year after birth

B. At birth

C. Before decidous incisors

D. 6 months of intra utrerine life

34. The most common sequence of eruption of the permanent maxillary teeth in children is_______________?
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A. 2-3-1-6-7-5-4-8

B. 6-1-2-4-3-5-7-8

C. 1-6-2-3-4-7-5-8

D. 6-1-2-3-4-5-7-8

35. The usual order of appearance of the primary teeth in the mouth is____________?
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A. Central incisors, lateral incisors, first molars canines, second molars

B. Central incisors, lateral incisors, first molars second molars, canines

C. Central incisors, lateral incisors, canines, second molars, first molars

D. Central incisors, first molars, lateral incisors, second molars, canines

36. Calcification of third molar begins at__________________?
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A. 8 years

B. 16 years

C. 18 months

D. 8 months

37. With respect to their permanent successors the sum of the mesidodistal diameters of the first and second decidous molar is generally ____________?
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A. Not related

B. Less

C. Greater

D. The same

38. The key to occlusion is_______________?
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A. Maxillary permanent second molar

B. Maxillary primary second molar

C. Maxillary primary first molar

D. Maxillary permanent first molar
39. Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference _____________?
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A. Primary roots show less a accessory and lateral canals

B. Primary roots are shorter

C. Primary roots resorb more easily

D. None of the above

40. The eruption are of maxillary permanent lateral incisor is_____________?
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A. 8-9 years

B. 8-9 months

C. 10-11 years

D. 6-7 years